Koh Samui in Winter — Weather & What to Expect
Winter in Koh Samui (December, January, February) averages daytime highs of 28.5°C and lows of 24.4°C, with around 263.0mm of rain across the season (47 rainy days in total). It includes some of the best months of the year to visit (December, January, February).
In the northern hemisphere, winter in Koh Samui covers December, January, February.
Winter in Koh Samui month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| December | 27.9°C | 24.4°C | 161.7mm | 19 | 9/10 |
| January | 28.5°C | 24.3°C | 43.1mm | 14 | 10/10 |
| February | 29.0°C | 24.5°C | 58.2mm | 14 | 10/10 |
What to pack for Koh Samui in winter
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
- Light waterproof layer
Frequently Asked Questions
Is winter a good time to visit Koh Samui?
Winter in Koh Samui rates around 10/10 — excellent time to visit. Average highs are 28.5°C with 263.0mm of rain across the season.
How hot is Koh Samui in winter?
Daytime highs average 28.5°C (83.3°F) across December, January, February, with nights around 24.4°C.
What months are winter in Koh Samui?
Koh Samui is in the northern hemisphere, so winter covers December, January, February.
See also: best time to visit Koh Samui · Koh Samui annual climate · Koh Samui in spring · Koh Samui in summer · Koh Samui in autumn
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Once you know what winter in Koh Samui looks like, find out exactly what to pack for Koh Samui at 247PackingList. For currency, language and country facts, see the Thailand guide at 247CountryInfo.
Winter in Koh Samui — what to pack
Lightweight travel clothing
Lightweight, breathable clothing and a compact travel umbrella are essential in this climate.
Check Price →Check clothing sizes in Thailand at 247Sizing before you shop.
More winter travel essentials
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.